Background Having used the FriendlyArm Nano PC T3 Plus for some commercial projects, the system was let down by the poor display readability in sunlight in outdoor situations. I initially tried the 900 nits 800×480 display from Newhaven but the low resolution meant that the display in the taskbar area was almost unreadable and the…
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So called Themal Imaging cameras have very poor image quality
Posted by davemclaughlin on January 4, 2019There are a number of thermal imaging cameras being offered by various sellers on AliExpress claiming them to be 160×220 pixels such as the HT-18 model I ordered below. They are basically all the same model but with different part numbers. HT-18 on AliExpress Having used a FLIR TG165 with 60×80 pixels I decided to…
Read MoreDC-DC module testing
Posted by davemclaughlin on September 18, 2018
I have been on the lookout for some off the shelf low cost DC-DC modules for a project that requires 5V at up to 3A. I considered doing my own but the cost of the parts is about 10 times the price of the low cost boards that are available from a number of local…
Read MoreLow cost but high quality PCB manufacturer
Posted by davemclaughlin on August 13, 2018As many of my projects are also hobby based I am always looking for the cheapest option to get professional PCB’s made. I came across AllPCB the other day and ordered 30 each of 3 small PCB’s I need for work to give them a try out. The speed of delivery was good at 3…
Read MoreJuno Parts Making
Posted by davemclaughlin on June 28, 2017Motor Mounts After having re-designed Juno in Fusion 360 I turned my attention to making some of the parts with the CNC machine I recently purchased for “work” projects. The first to be made was the small mounting plates for the geared motors. My original idea was for these to be made by Front Panel…
Read MoreJuno update
Posted by davemclaughlin on June 25, 2017
My Juno project has been delayed until Seeed Studio delivers the Respeaker and I can work out how to integrate this into the model but the good news is that I got an email saying that the Respeaker would be going out at the start of July 2017 so hopefully I will get them and…
Read MoreRaspberry Pi Serial Port
Posted by davemclaughlin on April 11, 2017I’ve been having some issues with the Enocean switches where the Pi would not respond to the commands unless you pressed the button a few times much to the annoyance of family members. In relation to this issue, I ran across something interesting the other day on Peter Scargill’s blog. http://tech.scargill.net/raspberry-pi-3-serial/ I then updated my…
Read MoreMQTT Scales for LPG gas bottle monitoring
Posted by davemclaughlin on January 23, 2017
Having ran out of gas a few times just when you are busy cooking can be a frustrating experience. Of course, the regulator is fitted with a gauge but as is normal, you never check this before you use it. So, it was time to geek it up a bit and see if I could…
Read MoreItead Smart Switch Flash Upgrade
Posted by davemclaughlin on November 15, 2016
I purchased 2 Itead Studio smart switches, V1.0.0, according to the PCB but the FLASH is only 8Mb so not enough to support the firmware I use so I need to remove the old one and fit some new replacement units. These are 32Mb and made by Winbond and the part number is W25Q32BVSIG. I got…
Read MoreEnocean Wireless and Battery Free Switches
Posted by davemclaughlin on October 2, 2016
One of my biggest issues with my home automation system is the need to have some kind of switch to be able to switch on and off lights. I was reluctant for a long time to put control in the likes of the toilet or bedroom for lack of being able to switch them on…
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